FOIL

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Here is a group of pictures that demonstrate what is meant by FOIL:

FOIL example

 

First-OIL:

First - FOIL

Multiply the first terms of the binomial factors to get the first term of the result.

 

F-Outer-IL:

Outer - FOIL

Multiply the outer terms of the binomial factors to get the second term of the result.

 

FO-Inner-L:

Innter - FOIL

Multiply the inner terms of the binomial factors to get the third term of the result.

 

FOI-Last:

Last - FOIL

Multiply the last terms of the binomial factors to get the last term of the result.

 

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